Threaded locking device



Oct. 7, 194-7. I w, U 2,428,463

THREADED LOCKING DEVICE Filed Dec. 30, 1942 INVENTOR AD/CHA/PD W 1005 ATTORNEY Patented Oct. 7, l947 UNITED STATES PATENT OFFICE THREADED LOCKING DEVICE Richard W. Luce, Southport, Conn.

Application December 30, 1942, Serial No. 470,588

7 Claims.

The invention herein disclosed relates to a threaded locking device of the kind disclosed in the co-pending application Serial No. 322,650, filed March 7, 1940, for Threaded locking device, which issued June 1, 1943, as Patent No. 2,320,785.

An object of the present invention is to provide a threaded locking device of this kind that may be made from sheet metal. Another object of the invention is to provide a threaded locking device that is comparatively light in weight, yet reliable in service and comparatively inexpensive to manufacture.

The foregoing objects and certain advantages that will hereinafter appear will be apparent in the specific embodiments of the invention illustrated in the accompanying drawings and described in detail below. The drawings include:

Fig. 1 which is a plan view of an anchor nut embodying the invention;

Fig. 2 which is a sectional elevation of the same taken on the line 2-2 of Fig. 2;

Fig. 3 which is a plan of a hexagonal nut embodying the invention; and

Fig. 4 which is a semi-sectional elevation of the same.

The nut illustrated in Figs. 1 and 2 of thedrawings is an anchor nut. Such a nut includes a flange I having openings 2 therethrough through which the flange I may be secured, as by rivets, to one of two plates to be secured together. In the anchor nut illustrated a boss 3 extends from the flange perpendicularly thereto. This boss is tapped to form the load-carrying thread i therein. The flange and boss are an integral piece of metal drawn and stamped from sheet metal.

To the flange I, there is secured another metal element denoted generally by the numeral 5. This element includes a cylindrical portion 6 surrounding the boss 3. The internal diameter of this cylindrical portion is somewhat greater than the external diameter of the boss. cylindrical portion has three detents 1 therein spaced angularly about its axis through angles of one hundred and twenty degrees. These detents engage the boss and serve to center the cylindrical portion 6 about the boss.

At one end of the cylindrical portion 6, there is an outwardly extending flange 8 which engages the flange I. These flanges are secured together, as by spot welding, to secure the two metal elements together. The spot welding is indicated at 9, Fig. 1.

At the opposite end of the cylindrical portion, there is an inturned flange [0. The inwardly extending flange I is bent through an angle of approximately one hundred and eighty degrees to form an axially extending end portion l I, axially alined with the threaded boss 3 and a curved resilient portion Ila uniting the cylindrical por- The tion 6 and the axially extending end portion. The axially extending end portion has a thread I2 therein of the same pitch as the thread 4 in the boss, but it is normally positioned, axially spaced from the end of the boss and with the thread thereof normally out of phase with the thread of the boss.

Each of the elements are produced separately without the threads therein. The elements consisting of the flange l and the boss 3 may desirably be of sheetmetal thicker than that from which the element 5 is made and sufficiently thick to have, when tapped, the desired pull strength. The element 5 is desirably made from metal of a thinness such as to give the desired resiliency to the resilient portion Ila. The two elements, unthreaded, are assembled in the relation illustrated. The flanges l and 8 are then spot welded. Next, the nut is tapped, the tap being run through both the boss 3 and the axially extending end portion ll] of the element 5. Then the nut is compressed to cause the resilient portion H to take a set with the thread l2 out of phase, slightly less than half the pitch of the thread, with the thread 4.

When a bolt is entered in the nut, it first engages the thread 4. To enter the thread I2, the resilient portion bends to permit the thread I2 to come into coincidence with the thread of the bolt. The resilient portion thus exerts an axial force which causes the thread of the bolt and the thread 4 to engage in surface, frictional contact.

In Figs. 3 and 4 of the drawing there is disclosed a hexagonal nut of similar construction. This nut includes two elements denoted generally by the numerals I3 and M. The element I3 includes a flange l5 and a boss I6 extending perpendicularly from the flange. The boss has the load-carrying thread ll formed therein. The flange [5 has a polygonal perimeter, specifically hexagonal, and the end section l8 thereof is bent to extend perpendicular to the flange.

In this construction also the element id may be of lesser thickness than the element l3. This element includes a portion ii) that surrounds the boss 16. The portion 23 is of hexagonal configuration in transverse section. At one end of the portion l9, there is an outwardly extending flange 20 the perimeter. of which is of hexagonal configuration. The flange 23 is received in and engages the end section I8 of the flange It.

At the opposite end of the portion [9, there is an inturned flange bent through an angle of approximately-one hundred and eighty degrees to form an axially extending end portion 2i axially spaced from the edge of the boss and united to the portion l9 by a curved resilient portion 22. The

ment of lesser thickness than the first thread thereof out of phase with the thread I! in a direction towards the boss I 6. The end portion and the portion l9 are centered With respect to the boss l6 by detents 24 formed in the flats of the portion '19.

In constructing this nut the elements l3 and [4 are made separately. They are assembled un-v threaded as illustrated and the flanges l5 and "29- are spot welded as indicated at '25, Thenut-fls then tapped, the tap being run through the boss I6 and the axially extending end -;p0rtion.-.;'2e'li.:.

Thereafter, the nut is compressed .to, icau segthe thread 23 to be out of phase with the thread 1'7.

The engagement between the edge of :jI-he'flange.

20 and the end section 18 of the flange I5 serves tolltransmit wrenching torque to- -the...fiahg e,.-l;5

without toomuch strainon thespot welds,. Normal1y in applyingthe nut, a wrenchisapplied-to the flats of the .portion 19 andthe torque-ap lied must be transmitted to the .-elem ent l 3.

From. the foregoing description of th embodie ments of the invention illustrated inthe dr v1.- in s .and specifically described above', it .will be seen that bythis invention ,there is providedga light, .reliable and inexpensivethreaded. locking device of the, kind to which theinyention relates. The parts are stamped and drawn 'from sheet metalcandmay be made .on automaticmachinery.

"Itwill'beobvious that various changes may',b.e made by those skilled in theartiinfthe details of the. embodiments of the invention .illustrated in the drawing anddescribed in detail abovewithin the principle and scopezof the invention-asexpressed in theappendedclaims.

I claim:

1.- A threadlockingdevice ofgthe kinddcscribed comprising. in combination aqmetfal, element including a flange. and a .tboss extending from the flange substantially perpendicularly thereto, {the boss having the load-carrying.threadthereim and another. metal element secured to said iirjstmentioned element and. including aportion surround ing theboss of said first .mentionedelement and anintur-ned. flange extending over the edge ot the boss and hav ng a thread t erein-oilikefpitch as the thread of theboss, the 'thread .in;.the. .flan ge bein normally out of phase with the threadgoithe boss. 7

' 201A. .threaded locking .-deyicel.of the kind described". comprising in combination a ;metal.zel eme t ncluding. a flan e. and a abess ex nd ng from the flange substantially perpendicularly thereto, theboss having the lcadecarryin 1 therein, and another metal iielen' ent s V said-first mentioned .elemen d including po tion surr undin t *bnssotsfid first meei element and 7 an *inturned flange bent through an angle of substantially one hundredand eighty'degrees to form an axially extend-ing end portion the said end portion having a threadth rein f Jike pitch as the thread of the,b'oss' .and -being nor mally positioned with thethread-thereotputpi phase with the threadof the bossl p 3. A threaded locking device ofthe lr-ind de scribed comprising in combination;agmet al ele ment of one thickness.includi a;;flangeanel a boss extending fromtheflzm-ge s ,p endicularly thereto, the .bQSS h carrying thread therein, and;anot her element secured thereto and surrounding the boss and ann r bent throusha an le: of substant ally; .on. shun. el

and ei hty, cle reesltozformq n axially extendin endmorticn, axially spaced: frometlie-lendzot the of phase with the thread of the boss. I

4. A, hexagonal lock-nut of 'theg kind {described comprising in combination ametalelement including a flange and a boss extending from the -.fiange substantially perpendicularly thereto, the

bosshavingthe load-carrying threads therein, and another metal element secured thereto and includinga hexagonal portion surrounding the b955,,and ,aninturne'd flange bent through an angle of substantially one hundred and eighty .degrees to form a cylindrical axially extending portion axially spacedjrom the end of the boss, h.,: i-i lend re a on-barman thr ad-therein of a ike-pi. ath sth eadeofcthe bossand closin ermal yrl o ibioncd -;with; th t r ad; t ereof out Lphaseg thn heithr ad of the bos S.-

.Aa hr ade e ccking :device v .of theokindizdescribed comprising in combination 'a metalsele- .ment -;;hayi ng an opening, therethrough; vWithathe lqadecarrying threadt er inwa id another; metal element isecuredjooesaidgfirst :mentioned element andjncludin .agpolition; secured tosaid-first men ,;tioned ;element sand gan- .inturned flange j extend- :inggoyerethe -ed elof :the :firstsmentioned element and having a thread therein of ,like,pitchl.-as:the thread; 10f, ;-the first mentioned-element .nor- .mally out; .ofcphase therewith.

1 6.; A==ithreaded ;.locking=..devi.ce v.of-.-.' the kind described comprising ;in: combination .a metal .ele-

ment .havingmnopening-;-therethroughwith the iloadawrrying ithread; therein,v andanother metal element secured to saidfirstimentioned. element and gincludin-gsa iportion surrounding the :first mentioned element candesecuredl .''thereto ..and an inturnedeflange extending; over .1the...edge of. ath'e first mentioned element zand ihaving-tal thread thereimof .slikecpitch as the.-- thread of the. \first mentioned element and normally out aofvsph'ase 7 axially alignedrelation with the-thread 'ofthe -firstmenti-9ned element-said threaded portion beingaxially -spaced ironrthe" thread'of the first mentionedgelement and having a thread :of like' m andm ma y tort P as the w th.- V RICHBD Wel-UQE-l REFERENCES G-ITED;

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Great :Britain Wm. .lm yi 12; 11942 

